⑴What did you do last night?____                  A. I got there by bus.

⑵How tall are you?____                                   B. I'm 1.60 metres.

⑶How did you get there?____                         C. I went to the Great Wall.

⑷Where did you go last weekend?____          D. I hurt my leg.

⑸What happened to you yesterday?____       E. I watched TV.

关于人口合理容量的叙述，正确的是（    ）

球的体积V（cm³）与球的半径R（cm）之间的关系式是V=$\frac{4}{3}\mathrm{\pi }{\mathrm{R}}^3$，这里的变量是____ ，常量是____